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<div><table class="navigation" id="top" width="100%" cellpadding="2" cellspacing="0"><tr><th valign="middle"><p class="title">GObject Reference Manual</p></th></tr></table></div>
<div><p class="releaseinfo">
      for GObject 2.30.0

      The latest version of this documentation can be found on-line at
      <a class="ulink" href="http://library.gnome.org/devel/gobject/unstable/" target="_top">http://library.gnome.org/devel/gobject/unstable/</a>.
    </p></div>
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<div class="toc"><dl>
<dt><span class="preface"><a href="pr01.html">Introduction</a></span></dt>
<dt><span class="part"><a href="pt01.html">I. Concepts</a></span></dt>
<dd><dl>
<dt><span class="chapter"><a href="chapter-intro.html">Background</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="chapter-intro.html#id424677">Data types and programming</a></span></dt>
<dt><span class="sect1"><a href="ch01s02.html">Exporting a C API</a></span></dt>
</dl></dd>
<dt><span class="chapter"><a href="chapter-gtype.html">The GLib Dynamic Type System</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="chapter-gtype.html#gtype-copy">Copy functions</a></span></dt>
<dt><span class="sect1"><a href="gtype-conventions.html">Conventions</a></span></dt>
<dt><span class="sect1"><a href="gtype-non-instantiable.html">Non-instantiable non-classed fundamental types</a></span></dt>
<dt><span class="sect1"><a href="gtype-instantiable-classed.html">Instantiable classed types: objects</a></span></dt>
<dd><dl><dt><span class="sect2"><a href="gtype-instantiable-classed.html#gtype-instantiable-classed-init-done">Initialization and Destruction</a></span></dt></dl></dd>
<dt><span class="sect1"><a href="gtype-non-instantiable-classed.html">Non-instantiable classed types: interfaces</a></span></dt>
<dd><dl>
<dt><span class="sect2"><a href="gtype-non-instantiable-classed.html#gtype-non-instantiable-classed-init">Interface Initialization</a></span></dt>
<dt><span class="sect2"><a href="gtype-non-instantiable-classed.html#gtype-non-instantiable-classed-dest">Interface Destruction</a></span></dt>
</dl></dd>
</dl></dd>
<dt><span class="chapter"><a href="chapter-gobject.html">The GObject base class</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="chapter-gobject.html#gobject-instantiation">Object instantiation</a></span></dt>
<dt><span class="sect1"><a href="gobject-memory.html">Object memory management</a></span></dt>
<dd><dl>
<dt><span class="sect2"><a href="gobject-memory.html#gobject-memory-refcount">Reference count</a></span></dt>
<dt><span class="sect2"><a href="gobject-memory.html#gobject-memory-weakref">Weak References</a></span></dt>
<dt><span class="sect2"><a href="gobject-memory.html#gobject-memory-cycles">Reference counts and cycles</a></span></dt>
</dl></dd>
<dt><span class="sect1"><a href="gobject-properties.html">Object properties</a></span></dt>
<dd><dl><dt><span class="sect2"><a href="gobject-properties.html#gobject-multi-properties">Accessing multiple properties at once</a></span></dt></dl></dd>
</dl></dd>
<dt><span class="chapter"><a href="chapter-signal.html">The GObject messaging system</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="chapter-signal.html#closure">Closures</a></span></dt>
<dd><dl>
<dt><span class="sect2"><a href="chapter-signal.html#id418465">C Closures</a></span></dt>
<dt><span class="sect2"><a href="chapter-signal.html#id415647">Non-C closures (for the fearless)</a></span></dt>
</dl></dd>
<dt><span class="sect1"><a href="signal.html">Signals</a></span></dt>
<dd><dl>
<dt><span class="sect2"><a href="signal.html#signal-registration">Signal registration</a></span></dt>
<dt><span class="sect2"><a href="signal.html#signal-connection">Signal connection</a></span></dt>
<dt><span class="sect2"><a href="signal.html#signal-emission">Signal emission</a></span></dt>
<dt><span class="sect2"><a href="signal.html#signal-detail">The <span class="emphasis"><em>detail</em></span> argument</a></span></dt>
</dl></dd>
</dl></dd>
</dl></dd>
<dt><span class="reference"><a href="rn01.html">II. API Reference</a></span></dt>
<dd><dl>
<dt>
<span class="refentrytitle"><a href="gobject-Type-Information.html">Type Information</a></span><span class="refpurpose"> — The GLib Runtime type identification and
    management system</span>
</dt>
<dt>
<span class="refentrytitle"><a href="GTypePlugin.html">GTypePlugin</a></span><span class="refpurpose"> — An interface for dynamically loadable types</span>
</dt>
<dt>
<span class="refentrytitle"><a href="GTypeModule.html">GTypeModule</a></span><span class="refpurpose"> — Type loading modules</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-The-Base-Object-Type.html">The Base Object Type</a></span><span class="refpurpose"> — The base object type</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Enumeration-and-Flag-Types.html">Enumeration and Flag Types</a></span><span class="refpurpose"> — Enumeration and flags types</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Boxed-Types.html">Boxed Types</a></span><span class="refpurpose"> — A mechanism to wrap opaque C structures registered
    by the type system</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Generic-values.html">Generic values</a></span><span class="refpurpose"> — A polymorphic type that can hold values of any
    other type</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Standard-Parameter-and-Value-Types.html">Parameters and Values</a></span><span class="refpurpose"> — Standard Parameter and Value Types</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-GParamSpec.html">GParamSpec</a></span><span class="refpurpose"> — Metadata for parameter specifications</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Varargs-Value-Collection.html">Varargs Value Collection</a></span><span class="refpurpose"> — Converting varargs to generic values</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Signals.html">Signals</a></span><span class="refpurpose"> — A means for customization of object behaviour
    and a general purpose notification mechanism</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Closures.html">Closures</a></span><span class="refpurpose"> — Functions as first-class objects</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-Value-arrays.html">Value arrays</a></span><span class="refpurpose"> — A container structure to maintain an array of
    generic values</span>
</dt>
<dt>
<span class="refentrytitle"><a href="GBinding.html">GBinding</a></span><span class="refpurpose"> — Bind two object properties</span>
</dt>
</dl></dd>
<dt><span class="reference"><a href="rn02.html">III. Tools Reference</a></span></dt>
<dd><dl>
<dt>
<span class="refentrytitle"><a href="glib-mkenums.html">glib-mkenums</a></span><span class="refpurpose"> — C language enum description generation utility</span>
</dt>
<dt>
<span class="refentrytitle"><a href="glib-genmarshal.html">glib-genmarshal</a></span><span class="refpurpose"> — C code marshaller generation utility for GLib closures</span>
</dt>
<dt>
<span class="refentrytitle"><a href="gobject-query.html">gobject-query</a></span><span class="refpurpose"> — display a tree of types</span>
</dt>
</dl></dd>
<dt><span class="part"><a href="pt02.html">IV. Tutorial</a></span></dt>
<dd><dl>
<dt><span class="chapter"><a href="howto-gobject.html">How to define and implement a new GObject</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="howto-gobject.html#howto-gobject-header">Boilerplate header code</a></span></dt>
<dt><span class="sect1"><a href="howto-gobject-code.html">Boilerplate code</a></span></dt>
<dt><span class="sect1"><a href="howto-gobject-construction.html">Object Construction</a></span></dt>
<dt><span class="sect1"><a href="howto-gobject-destruction.html">Object Destruction</a></span></dt>
<dt><span class="sect1"><a href="howto-gobject-methods.html">Object methods</a></span></dt>
<dd><dl>
<dt><span class="sect2"><a href="howto-gobject-methods.html#id499985">Non-virtual public methods</a></span></dt>
<dt><span class="sect2"><a href="howto-gobject-methods.html#id500010">Virtual public methods</a></span></dt>
<dt><span class="sect2"><a href="howto-gobject-methods.html#id500094">Virtual private Methods</a></span></dt>
</dl></dd>
<dt><span class="sect1"><a href="howto-gobject-chainup.html">Chaining up</a></span></dt>
</dl></dd>
<dt><span class="chapter"><a href="howto-interface.html">How to define and implement interfaces</a></span></dt>
<dd><dl>
<dt><span class="sect1"><a href="howto-interface.html#howto-interface-define">How to define interfaces</a></span></dt>
<dt><span class="sect1"><a href="howto-interface-implement.html">How To define implement an Interface?</a></span></dt>
<dt><span class="sect1"><a href="ch06s03.html">Interface definition prerequisites</a></span></dt>
<dt><span class="sect1"><a href="howto-interface-properties.html">Interface Properties</a></span></dt>
</dl></dd>
<dt><span class="chapter"><a href="howto-signals.html">How to create and use signals</a></span></dt>
<dd><dl><dt><span class="sect1"><a href="howto-signals.html#howto-simple-signals">Simple use of signals</a></span></dt></dl></dd>
</dl></dd>
<dt><span class="part"><a href="pt03.html">V. Related Tools</a></span></dt>
<dd><dl>
<dt><span class="chapter"><a href="tools-vala.html">Vala</a></span></dt>
<dt><span class="chapter"><a href="tools-gob.html">GObject builder</a></span></dt>
<dt><span class="chapter"><a href="tools-ginspector.html">Graphical inspection of GObjects</a></span></dt>
<dt><span class="chapter"><a href="tools-refdb.html">Debugging reference count problems</a></span></dt>
<dt><span class="chapter"><a href="tools-gtkdoc.html">Writing API docs</a></span></dt>
</dl></dd>
<dt><span class="index"><a href="api-index-full.html">Index</a></span></dt>
<dt><span class="index"><a href="api-index-deprecated.html">Index of deprecated symbols</a></span></dt>
<dt><span class="index"><a href="api-index-2-2.html">Index of new symbols in 2.2</a></span></dt>
<dt><span class="index"><a href="api-index-2-4.html">Index of new symbols in 2.4</a></span></dt>
<dt><span class="index"><a href="api-index-2-6.html">Index of new symbols in 2.6</a></span></dt>
<dt><span class="index"><a href="api-index-2-8.html">Index of new symbols in 2.8</a></span></dt>
<dt><span class="index"><a href="api-index-2-10.html">Index of new symbols in 2.10</a></span></dt>
<dt><span class="index"><a href="api-index-2-12.html">Index of new symbols in 2.12</a></span></dt>
<dt><span class="index"><a href="api-index-2-14.html">Index of new symbols in 2.14</a></span></dt>
<dt><span class="index"><a href="api-index-2-18.html">Index of new symbols in 2.18</a></span></dt>
<dt><span class="index"><a href="api-index-2-22.html">Index of new symbols in 2.22</a></span></dt>
<dt><span class="index"><a href="api-index-2-24.html">Index of new symbols in 2.24</a></span></dt>
<dt><span class="index"><a href="api-index-2-26.html">Index of new symbols in 2.26</a></span></dt>
<dt><span class="index"><a href="api-index-2-28.html">Index of new symbols in 2.28</a></span></dt>
<dt><span class="index"><a href="api-index-2-30.html">Index of new symbols in 2.30</a></span></dt>
<dt><span class="glossary"><a href="annotation-glossary.html">Annotation Glossary</a></span></dt>
</dl></div>
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